public class E4{
  public static void main (String args[]){
	int[] a={10,20,30,40},b[]={{1,2},{4,5,6,7}};
	b[0]=a;
	b[0][1]=b[1][3];
	System.out.println(b[0][3]);
	System.out.println(a[1]);	
	}
}

